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Driver core: Fix device_move() vs. dpm list ordering, v2

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dpm_list currently relies on the fact that child devices will
be registered after their parents to get a correct suspend
order. Using device_move() however destroys this assumption, as
an already registered device may be moved under a newly registered
one.

This patch adds a new argument to device_move(), allowing callers
to specify how dpm_list should be adapted.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Cornelia Huck 2009-03-04 12:44:00 +01:00 • committed by Greg Kroah-Hartman
parent 60530afe1e
commit ffa6a7054d
8 changed files with 92 additions and 9 deletions
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11
include/linux/pm.h
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@ -400,6 +400,9 @@ extern void __suspend_report_result(const char *function, void *fn, int ret);
#else /* !CONFIG_PM_SLEEP */
#define device_pm_lock() do {} while (0)
#define device_pm_unlock() do {} while (0)
static inline int device_suspend(pm_message_t state)
{
return 0;
@ -409,6 +412,14 @@ static inline int device_suspend(pm_message_t state)
#endif /* !CONFIG_PM_SLEEP */
/* How to reorder dpm_list after device_move() */
enum dpm_order {
DPM_ORDER_NONE,
DPM_ORDER_DEV_AFTER_PARENT,
DPM_ORDER_PARENT_BEFORE_DEV,
DPM_ORDER_DEV_LAST,
};
/*
* Global Power Management flags
* Used to keep APM and ACPI from both being active